package day3

import scala.collection.mutable

/**
  * list demo
  */
object ListDemo {
  def main(args: Array[String]): Unit = {
    val lst1 = List(1, 2, 3)
    val list2 = 0 :: lst1
    //list2.sortBy();
    //list2.sortWith()
    val set1 = new mutable.HashSet[Int]()
  }
}
